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<h2><b>atan2()</b></h2><p>

<code>atan2 (<i>expr1, expr2</i>)</code>

<p>
Applies the tan<sup>-1</sup> function to the result of
(<code><i>expr1/expr2</i></code>). 
<p>
If <code><i>expr1</i></code> and <code><i>expr2</i></code> are both
zero, the result is arbitrarily set to zero. The result of the
<code>atan2</code> function is in radians.


<H3>Usage Notes</H3><P>
<H3>Examples</H3><P>



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